thank you for reply ...
yes if course its assigned to administrator and i logging in to client through administrator account ,
one more thing that i doubt , is there any special ports maybe need to be opened on firewall for transfer? i don't think that because transfering for 4.7 GB as showing in the attached picture reach 10.00 MB and then release disk and showing the error.
note that i tried it on different network with no luck , is there something i missed?
one more thing that i this happened with Vcenter pool and manual pool , i tried with templates and machines , same old story